On a Mac
- Copy the promo code.
- Open iBooks app, click on the iBooks Store button (top left of window).
- Then just under your account email address there is a link called Redeem.
- Click that, enter your Apple password.
- Paste the promo code in the field shown.
On an iPhone or iPad
- Copy the promo code.
- Open iBooks app
- Tap on your Avatar (top right of screen).
- Scroll down to where it says Redeem Gift Card or Code.
- Then just under your account email address there is a link called Redeem.
- In the pane that opens, tap into the field that says “You can also enter your code manually“.
This is just under the Use Camera button. - Now paste your promo code.